color subtraction example: –newspapers and the new zip-lock sandwich bags use color subtraction
TRANSCRIPT
• Color Subtraction Example: – Newspapers and the new zip-lock
sandwich bags use color subtraction.
White
Red
Green
Blue
Yellow
Cyan
Magenta
Primary Colors
Green
Pure Green
Color AdditionPrimary Green
Why is the sky blue?Why is the sky blue?
• Nitrogen and Oxygen in our atmosphere scatter high frequencies of light.
Why are sunsets red?Why are sunsets red?• Red light is scattered the least by our
atmosphere.
• The greatest path of sunlight through the atmosphere is at sunset or sunrise.
Why are clouds white?Why are clouds white?
• The color of light scattered by clusters of water molecules vary with the size of the clusters.
• The size of clusters of water molecules (droplets) vary in clouds.
Why is the ocean Why is the ocean greenish blue?greenish blue?
• Red light is absorbed by the molecules in the water.
Color VisionColor Vision• Colorblindness - about 10% of population• Red-green is predominant• Yellow-blue - a few• Total - some
• Complementary Colors - any two colors that add together to produce white
• e.g. magenta + green = white
Optical Illusions
Animation
